Why the Japanese master of haiku spent his life writing about fleas and flies

Ideas & Philosophy · Published 3 October 2026 Swipe more like this →

In short: Kobayashi Issa, one of Japan's four great haiku masters, found beauty in the smallest, most overlooked creatures. While his peers focused on traditional themes, Issa filled his journals with hundreds of verses about mosquitoes, toads, and fleas, turning his own profound personal suffering into a radical, irreverent, and deeply human art.

Born in 1763 as Kobayashi Nobuyuki, Issa lived a life defined by hardship. After losing his mother at age three and suffering through a difficult relationship with his stepmother, he spent years wandering Japan, often penniless and embroiled in legal battles over his father's inheritance. These experiences shaped a poetic voice that was strikingly different from the orthodox tradition established by Bashō. While Bashō is often seen as the standard-bearer of haiku, Issa is frequently viewed as a 'conspicuous heretic' whose work was an intimate, unfiltered diary of his own heart.

Issa’s output was staggering, with over 20,000 haiku to his name. He is particularly famous for his focus on the 'lower creatures.' He wrote roughly 1,000 verses on insects and small animals, including 230 on fireflies, 200 on frogs, and over 100 on fleas. This was not merely a stylistic choice; it was a reflection of his own precarious existence. Even when a fire destroyed his home in 1827, forcing him into a windowless storehouse, he found humor in his situation, noting that the fleas had fled the burning house to join him in his refuge.

His work, including autobiographical prose-haiku hybrids like 'The Spring of My Life,' remains vital today for its conversational tone and use of local dialects. Issa’s ability to find the profound in the mundane—such as his famous poem urging a snail to climb Mount Fuji—has resonated across centuries, influencing writers like J.D. Salinger and the Strugatsky brothers. By the time of his death in 1828, Issa had cemented his legacy not as a distant master, but as a poet who lived his art, transforming his personal tragedies into a lasting, wry, and deeply empathetic body of work.

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